css_typings.bzl

def css_typings(name, srcs, path):
    # Only create outputs for css files.
    outs = [f.replace(".css", ".css.d.ts") for f in srcs if f[-4:] == ".css"]
    if (len(outs) == 0):
        fail("No .css files found, check your srcs")

    # Some little hacks in here to work with nested workspaces and the tcm CLI.
    native.genrule(
        name = name,
        srcs = srcs + [":BUILD"],
        outs = outs,
        cmd = """$(location //:tcm) --silent -o $(GENDIR) -p "$$(dirname $(location :BUILD))/**/*.css" """,
        tools = ["//:tcm"],
    )